Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
What chemical oxidant would be most effective for controlling biological growth?
2.
The fluoride injection point should be located after water has received complete treatment.
3.
What is used for detection of chlorine gas leaks?
4.
When pumping from Well #1 the static level of Well #2 drops. What causes this?
5.
What type of water violation requires an all clear notification be given to the public?
6.
With coagulation reactions when alum is used, the specific insoluble floc formed is a precipitate of?
7.
What is calcium sulfate also known as?
8.
What is the typical strength of calcium hypochlorite?
9.
Why has magnetic ion exchange resin been developed?
10.
In a thermally stratified reservoir, water located beneath the thermocline may?
11.
What type of filtration is permitted under the Surface Water Treatment Rule?
12.
In what form is Iron soluble in water?
13.
What are the four zones that divide a typical sedimentation basin?
14.
What are different types of media used to filter water for human consumption?
15.
What precipitates can foul a cation exchange resin?
16.
What is the main problem if particle agglomeration is occurring in a filter for iron and manganese removal at the interface of the coal layer below?
17.
Dissolved-Air flotation is particularly good for?
18.
The temperature range at which coliform bacteria samples must be stored before being delivered to a lab is?
19.
In the MNO-MUG test the presence of E.coli is indicted by?
20.
Giardia Lamblia is transmitted?
21.
Which of the following illnesses is it hardest to kill the organism that causes the illness?
23.
What water rights are acquired from diverting a water source and then putting it to beneficial use?
24.
What term describes the gathering of colloids into larger particles?
25.
Granular activated carbon is used as?
26.
The Colilert test (ONPG-MUG) shows the presence of total coliforms is shown by?
27.
A constituent dissolved in source water that will precipitate when oxidized is?
28.
Reaching breakpoint chlorination means?
29.
If the continuous monitoring of the residual disinfectant concentration of the water entering the water system fails, how often will an operator need to collect a grab sample until the problem is fixed?
30.
Assuming all other variables remain the same, a decrease in the pH when using free chlorine would?
31.
When a raw water analysis shows the presence of anabaena, ceratium and oscillatoria, what problem may arise?
32.
What is the best disinfectant against Cryptosporidium?
33.
What are the hair like appendages that Giardia trophozoites use to propel themselves through water are?
34.
Floc is produced when there is a chemical reaction between the coagulant and alkalinity. If the alkalinity of raw water is too low the floc formation will be poor. Some form of alkalinity must be added if the amount that is naturally found in the water source is less than?
35.
Protozoa that must be removed from raw water are?
36.
Community and non-transient community water systems must test for what if they use ozone for disinfection of oxidation?
37.
In alum sludge, what is typically the percentage of solid material?
38.
What chemical oxidant would be best for controlling the forming of THMs?
39.
A common chemical added to boost alkalinity is?
40.
The maximum sustained flow possible from a well mostly depends on?
41.
Which of these has the most impact on tastes and odors in water?
42.
Ion exchange processes can typically be used for direct groundwater treatment as long as turbidity and what else have levels that are not excessive?
43.
Filter alum and polymer compounds are primarily
44.
When must a water system collect annual samples if the water system has been determined to be reliable by the State and consistently below the MCL level for organic compounds?
45.
What is the primary drawback for facilities that use ultra violet light to disinfect water?
46.
What conventional treatment step is eliminated by direct filtration?
47.
What is the next test when the membrane filter test shows four green colored colonies after incubating for 24hrs?
48.
During daylight hours, algae growth in a reservoir will do what?
49.
Why do mud balls and hard spots develop in high rate gravity filters during the summer months?
50.
What parameter must be much better than conventional treatment basins in basins using tube and plate settlers?
